Just a quick update. The system is on autopilot for the most part. The CaRx/Kalkwasser stirrer hybrid approach is keeping pH betwren 8.0-8.3. Alkalinity, Calcium, Magnesium and Potassium have also been rock solid steady.
I lost my male Swallowtail Angel to something. One moment he was swimming around, eating and enjoying his place near the top of the hierarchy, the next he was suffering in the corner of the tank. Bummer.
In the wake of this, I found a Blonde Naso Tang who was in need of care; he's done a complete 180 from a sunken rough looking specimen to a fat healthy tang to match the rest of the group. I also sourced a Zebra Swallowtail Angelfish (who is showing more of a male's coloration) and he is establishing himself.